Excel VBA object constructor and destructor
VBA supports Class Modules. They have a Class_Initialize event that is the constructor and a Class_Terminate that is the destructor. You can define properties and methods.I believe VBA uses reference counting for object lifecycle. Which is why you see a lot of Set whatever = Nothing in that type of code. In your example case I think it will not leak any memory. But you need to be careful of circular references.
If you are making a class module in VBA, for the constructor, you can use:
Private Sub class_initialize()....End Sub
There are no destructors, since VBA is garbage collected. Just make sure to clean up any circular references, and you should avoid any possible memory leaks.
It's been a while since I've used them, but I don't think you can pass parameters into the constructors. I think that was one of the problems I ran into, but I was running into so many issues of how thse classes worked and how I expected them to work that I may be misremembering.